Fortune has released its list of the U.S. companies with the highest gross revenue in 2010. Walmart remains the top company on the list, despite declining sales. ExxonMobil, Chevron, and ConocoPhillips followed in that order. Though Walmart topped the list with the highest revenue in 2010, it was not the most profitable company on the list. ExxonMobil recorded a net profit of $30.5 billion compared with Walmart’s $16.4 billion.